Device for rapidly detecting concentration of surfactant in washing water

The utility model discloses a rapid detection device for the concentration of a surfactant in washing water. The rapid detection device comprises an outer shell, a through groove for washing water tocirculate is formed in one end of the outer shell, and the end of the outer shell is divided into a first cavity and a second cavity through the through groove. Optical elements for measuring the concentration of a surfactant are respectively arranged in the first chamber and the second chamber, and a plurality of first light holes corresponding to the optical elements are respectively formed in two side walls of the through groove; a composite band-pass optical filter is fixed to the side wall, corresponding to the first cavity, of the through groove, a quartz window piece is fixed to the side wall, corresponding to the second cavity, of the through groove, and the composite band-pass optical filter and the quartz window piece cover the first light holes in the side wall of the corresponding through groove. The d